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Thanks handyman jo just did that and it works fine. Help much appreciated

Hi I have just replaced my battery in the main control tested the internal pir via a walk through test panel code and my external sounder via the strobe test code. All worked fine but when I set the alarm and enter the house although the internal sounders go off the external bell box neithe...

Thanks for your responses. The existing sensors are a bit old and discoloured. Bits of the cases have cracked when I have opened them in the past. Also from time to time the alarm goes off over night for no reason. After chatting to a local engineer he suggested that it could be faulty tamper...

I have a scantronic 9800 home intruder alarm systemand I want to replace the pir. Could anyone advise me what would be a suitable replacement please Thanks Ted